P0602

CIRCUIT DESCRIPTION
This DTC indicates that the PCMs internal EEPROM is not flashed with any vehicle software. If you install a service PCM and do not flash the EEPROM, the engine will not run. This DTC indicates that an un-flashed PCM causes the engine cranks but will not run situation.

CONDITIONS FOR RUNNING THE DTC
The ignition switch is in the run position.

CONDITIONS FOR SETTING THE DTC
No software data is present in the PCM.

ACTION TAKEN WHEN THE DTC SETS
The PCM illuminates the Malfunction Indicator Lamp (MIL) when the diagnostic runs and tails. The PCM records the operating conditions at the time the diagnostic tails. The PCM stores this information in the Freeze Frame and/or the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC
^ The PCM turns the Malfunction Indicator Lamp (MIL) OFF after 3 consecutive ignition cycles that the diagnostic runs and does not fail. A last test failed (current DTC) clears when the diagnostic runs and does not fail.
^ A History DTC clears after 40 consecutive warm-up cycles, it this or any other emission related diagnostic does not report any failures.
^ Use a scan tool in order to clear the MIL/DTC.

TEST DESCRIPTION

Diagnostic Chart:

The numbers below refer to the step numbers on the diagnostic table.
3. It the flashing routine fails, verify that the equipment used is functioning properly and that all cable connections are clean and tight. Also, make sure that the software you download is correct for the PCM being flashed. If everything is OK, and a second attempt fails, the PCM is faulty.